Patents by Inventor Margareta Wennerback

Margareta Wennerback has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10561538
    Abstract: A method for production of disposable hygienic absorbent articles, the method comprising advancing in a first direction a continuous length of a substantially homogeneous elastic laminate web having a maximum elastic extensibility in the first direction of at least 40% under a peak load Fp; maintaining said substantially homogeneous elastic laminate web under a tensioning load Ft in the first direction during the advancing, the tensioning load Ft satisfying the condition: 0.03 Fp?Ft?0.25 Fp; attaching individual absorbent cores to the substantially homogeneous elastic laminate web while maintaining said substantially homogeneous elastic laminate web under the tensioning load Ft; and severing the substantially homogenous elastic laminate web into individual disposable hygienic absorbent articles.
    Type: Grant
    Filed: February 19, 2018
    Date of Patent: February 18, 2020
    Assignee: ESSITY HYGIENE AND HEALTH AKTIEBOLAG
    Inventors: Kent Hermansson, Jan Wästlund-Karlsson, Margareta Wennerbäck, Carina Hedlund, Niclas Norrby
  • Patent number: 10201458
    Abstract: A method for producing pant-type articles having a waist-encircling portion and leg-encircling portions. The method includes forming a chassis structure and at least one elastic panel being formed by providing a first web, which is an elastic web including at least one layer of an elastic material. The first web is stretched at least 70% in at least one direction. The stretched first web is bonded while the first web is held in the stretched state to a second web. The second web includes at least one layer of an elastic or non-elastic material, and the bonded first and second webs form an elastic composite web. The elastic composite is relaxed in the at least one direction by at least 4% of the stretched length of the stretched first web. The chassis structure is assembled from chassis components including the stretched and relaxed composite web.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: February 12, 2019
    Assignee: ESSITY HYGEINE AND HEALTH AKTIEBOLAG
    Inventors: Ulrika Carlson, Hans Een, Margareta Wennerbäck
  • Publication number: 20180168883
    Abstract: A method for production of disposable hygienic absorbent articles, the method comprising advancing in a first direction a continuous length of a substantially homogeneous elastic laminate web having a maximum elastic extensibility in the first direction of at least 40% under a peak load Fp; maintaining said substantially homogeneous elastic laminate web under a tensioning load Ft in the first direction during the advancing, the tensioning load Ft satisfying the condition: 0.03 Fp?Ft?0.25 Fp; attaching individual absorbent cores to the substantially homogeneous elastic laminate web while maintaining said substantially homogeneous elastic laminate web under the tensioning load Ft; and severing the substantially homogenous elastic laminate web into individual disposable hygienic absorbent articles.
    Type: Application
    Filed: February 19, 2018
    Publication date: June 21, 2018
    Applicant: SCA Hygiene Products AB
    Inventors: Kent HERMANSSON, Jan WÄSTLUND-KARLSSON, Margareta WENNERBÄCK, Carina HEDLUND, Niclas NORRBY
  • Patent number: 9271880
    Abstract: A pant type absorbent article such as a pant diaper, a sanitary pant or incontinence pant, said article having a core region (3) comprising an absorbent core (2) and a chassis region (4) surrounding the core region. The chassis comprises front, back and waist regions (5, 6 and 7). The article in at least a part of the chassis region (4) comprises an outer coversheet (10) in the form of an elastic web material (11) constituting the sole component of the chassis (4) in at least 20% of the total surface area of the article (1), said elastic laminate having an opacity of at least 40% and a basis weight of no more than 100 g/m2.
    Type: Grant
    Filed: October 4, 2004
    Date of Patent: March 1, 2016
    Assignee: SCA HYGIENE PRODUCTS AB
    Inventors: Tomas Karlson, Anders Gustafsson, Urban Widlund, Jan Wastlund-Karlsson, Margareta Wennerback
  • Publication number: 20150313765
    Abstract: A method for production of disposable pant diapers, the method including providing a length of a substantially homogeneous elastic laminate web having a maximum elastic extensibility in a first direction of at least 40% under a peak load Fp; advancing the length of the substantially homogeneous elastic laminate web in the first direction; attaching individual absorbent cores to the length of the elastic laminate web during the advancing to create a strip, while maintaining the length of the substantially homogeneous elastic laminate web under a tensioning load Ft in the first direction; folding the strip onto itself; maintaining the length of the substantially homogeneous elastic laminate web under the tensioning load Ft in the first direction during the folding; the tensioning load Ft satisfying the condition: 0.03 Fp?Ft?0.25 Fp; and welding the substantially homogeneous elastic laminate web and severing the individual pant diapers along the weld lines.
    Type: Application
    Filed: July 16, 2015
    Publication date: November 5, 2015
    Applicant: SCA Hygiene Products AB
    Inventors: Kent HERMANSSON, Jan WASTLUND-KARLSSON, Margareta WENNERBACK, Carina HEDLUND, Niclas NORRBY
  • Patent number: 9114041
    Abstract: A method for production of disposable hygienic absorbent articles (12) in which each article has a substantially homogenous elastic laminate web (14) having a maximum elastic extensibility in a first direction of at least 40%, preferably at least 60%, and most preferably at least 80%, under a peak load Fp, and an absorbent core (16) attached to the elastic laminate web. The method including the steps of providing a continuous length of the elastic laminate web (14); advancing the continuous length of the elastic laminate web in a direction of travel (A) corresponding to the first direction; attaching individual absorbent cores (16) to the continuous length of the elastic laminate web at spaced intervals, and forming individual articles (12) from the thus assembled individual absorbent cores and the continuous length of said elastic laminate web.
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: August 25, 2015
    Assignee: SCA HYGIENE PRODUCTS AB
    Inventors: Kent Hermansson, Jan Wästlund-Karlsson, Margareta Wennerbäck, Carina Hedlund, Niclas Norrby
  • Patent number: 9102132
    Abstract: A pant type absorbent article having a core region includes an absorbent core and a chassis region surrounding the core region. The article in at least a part of the chassis region includes a coversheet in the form of an elastic laminate constituting the sole component of the chassis in at least 20% of the total surface area of the article. The elastic laminate has a tensile strength of at least 15 N/25 mm both in the longitudinal and transverse directions of the article and a tensile strength in the transverse direction of the article which is no more than 2.5 times and preferably no more than 2 times higher than the tensile strength in the longitudinal direction of the article. The force required to extend the elastic laminate 10% in the longitudinal direction of the article is no more than 5 N/25 mm.
    Type: Grant
    Filed: November 13, 2006
    Date of Patent: August 11, 2015
    Assignee: SCA HYGIENE PRODUCTS AB
    Inventor: Margareta Wennerbäck
  • Patent number: 8852372
    Abstract: A method for producing pant-type absorbent articles, each article including a chassis structure having at least one elastic panel and an integrated absorbent core component, the method including a continuous pant-forming process including forming the chassis structure and incorporating the absorbent core component into the chassis structure. The at least one elastic panel is formed by a) separately producing a two-layer laminate having a first non-elastic fibrous nonwoven web and an elastic film, b) activating the two-layer laminate by incremental stretching in at least one activation direction to render the two-layer laminate elastically stretchable, c) stretching the activated two-layer laminate by 10-200% in the activation direction, d) introducing the two-layer laminate) in the pant-forming process, and e) laminating the elastic film of the stretched two-layer laminate to an elastic or nonwoven chassis component. An absorbent pant-type article produced in accordance with the method.
    Type: Grant
    Filed: May 12, 2006
    Date of Patent: October 7, 2014
    Assignee: SCA Hygiene Products AB
    Inventors: Elisabeth Lakso, Margareta Wennerbäck, Jan Wästlund-Karlsson
  • Patent number: 8741083
    Abstract: A method for producing an elastically stretchable laminate having at least three layers, the method including the steps of: a) producing a first laminate having a first non-elastic fibrous nonwoven web and an elastic film; b) activating the first laminate by incremental stretching in at least one activation direction to render the first laminate elastically stretchable; c) stretching the activated first laminate to 10-200% in the activation direction; and d) laminating the stretched first laminate to a second non-elastic nonwoven web. An elastically stretchable laminate produced in accordance with the method is also disclosed.
    Type: Grant
    Filed: May 12, 2006
    Date of Patent: June 3, 2014
    Assignee: SCA Hygiene Products AB
    Inventors: Margareta Wennerbäck, Jan Wästlund-Karlsson, Elisabeth Lakso
  • Patent number: 8444617
    Abstract: A pant-type absorbent article having an absorbent assembly having an absorbent core and a chassis, wherein the front and back portions are joined to each other along two opposite longitudinal side edges to define a waist-opening and a pair of leg-openings, at least one of the front and back portions has an elastic web material, a crotch portion located between the front portion and the back portion in the longitudinal direction of the article, the front portion having a length in the longitudinal direction, the back portion having a length in the longitudinal direction, and the crotch portion having a length in the longitudinal direction, the absorbent assembly overlapping a distance with both the front and back portions, the article having a longitudinal and a transverse direction, wherein the absorbent assembly overlaps no more than 20% of the surface area of each of the front and back portions.
    Type: Grant
    Filed: January 28, 2010
    Date of Patent: May 21, 2013
    Assignee: SCA Hygiene Products AB
    Inventor: Margareta Wennerbäck
  • Patent number: 8303565
    Abstract: An absorbent article includes an absorbent section having first and second end portions and a central portion. A waist belt is attached to the absorbent section at its first end and has first and second belt portions extending on each side of the first end of the absorbent section for securing to each other around a wearer of the absorbent article. The second end of the absorbent section includes a fastening device for securing the second end of the absorbent section to the waist belt. The waist belt has a visual appearance different from the absorbent section, so as to simulate a belt. This provides the user with intuitive information on how the absorbent article should be applied.
    Type: Grant
    Filed: April 27, 2009
    Date of Patent: November 6, 2012
    Assignee: SCA Hygiene Products AB
    Inventors: Maria Gustin Bergström, Margareta Wennerbäck
  • Patent number: 8109916
    Abstract: A pant-type absorbent article (55) includes a chassis structure, the chassis structure including a front panel (56), a back panel and a crotch panel (58) arranged between the front and back panels (56,57) and front and back waist panels (61a,61b) arranged at the front and back panels (56,57) respectively. At least one of the front and back panels (56,57) includes an activated three-layer elastic laminate (68) including a first fibrous nonwoven web and a second fibrous nonwoven web and an elastic film between the first and second fibrous nonwoven webs. At least one of the first and second fibrous nonwoven webs is a creped nonwoven web.
    Type: Grant
    Filed: November 13, 2006
    Date of Patent: February 7, 2012
    Assignee: SCA Hygiene Products AB
    Inventor: Margareta Wennerbäck
  • Patent number: 8092440
    Abstract: An absorbent article of the kind which is worn as a pair of absorbent pants with a waist opening defined by a rear waist edge and a front waist edge, and two leg openings. The absorbent article preferably includes an absorbent body attached to a covering. The covering preferably includes an elastic material arranged within an area which extends at least from the front waist edge to the leg openings. The elastic material is preferably treated. The treated elastic material preferably has no or reduced elasticity within a portion of the covering overlapping the absorbent core.
    Type: Grant
    Filed: June 28, 2004
    Date of Patent: January 10, 2012
    Assignee: SCA Hygiene Products AB
    Inventors: Kent Hermansson, Carina Hedlund, Niclas Norrby, Jan Wästlund-Karlsson, Margareta Wennerbäck
  • Patent number: 8052665
    Abstract: A pant type absorbent article such as a pant diaper, a sanitary pant or incontinence pant, the article having a core region including an absorbent core and a chassis region surrounding the core region. The article at least in part of the chassis region has an outer coversheet in the form of an elastic laminate having a Softness (S) according to Kawabata of at least 20. The laminate includes first and second layers of fibrous material and an elastic film layer located between the first and second fibrous layers.
    Type: Grant
    Filed: June 22, 2004
    Date of Patent: November 8, 2011
    Assignee: SCA Hygiene Products AB
    Inventors: Jan Wastlund-Karlsson, Margareta Wennerback
  • Publication number: 20110209270
    Abstract: A method for producing pant-type articles having a waist-encircling portion and leg-encircling portions. The method includes forming a chassis structure and at least one elastic panel being formed by providing a first web, which is an elastic web including at least one layer of an elastic material. The first web is stretched at least 70% in at least one direction. The stretched first web is bonded while the first web is held in the stretched state to a second web. The second web includes at least one layer of an elastic or non-elastic material, and the bonded first and second webs form an elastic composite web. The elastic composite is relaxed in the at least one direction by at least 4% of the stretched length of the stretched first web. The chassis structure is assembled from chassis components including the stretched and relaxed composite web.
    Type: Application
    Filed: November 3, 2008
    Publication date: September 1, 2011
    Applicant: SCA HYGIENE PRODUCTS AB
    Inventors: Ulrika Carlson, Hans Een, Margareta Wennerbäck
  • Publication number: 20110144610
    Abstract: A pant type absorbent article such as a pant diaper, a sanitary pant or incontinence pant, said article having a core region (3) comprising an absorbent core (2) and a chassis region (4) surrounding the core region. The chassis comprises front, back and waist regions (5, 6 and 7). The article in at least a part of the chassis region (4) comprises an outer coversheet (10) in the form of an elastic web material (11) constituting the sole component of the chassis (4) in at least 20% of the total surface area of the article (1), said elastic laminate having an opacity of at least 40% and a basis weight of no more than 100 g/m2.
    Type: Application
    Filed: October 4, 2004
    Publication date: June 16, 2011
    Applicant: SCA HYGIENE PRODUCTS AB
    Inventors: Tomas Karlson, Anders Gustafsson, Urban Widlund, Jan Wastlund-Karlsson, Margareta Wennerback
  • Publication number: 20100324513
    Abstract: A pant-type absorbent article (55) includes a chassis structure, the chassis structure including a front panel (56), a back panel and a crotch panel (58) arranged between the front and back panels (56,57) and front and back waist panels (61a,61b) arranged at the front and back panels (56,57) respectively. At least one of the front and back panels (56,57) includes an activated three-layer elastic laminate (68) including a first fibrous nonwoven web and a second fibrous nonwoven web and an elastic film between the first and second fibrous nonwoven webs. At least one of the first and second fibrous nonwoven webs is a creped nonwoven web.
    Type: Application
    Filed: November 13, 2006
    Publication date: December 23, 2010
    Applicant: SCA Hygiene Products AB
    Inventor: Margareta Wennerbäck
  • Publication number: 20100298798
    Abstract: The invention concerns a method for producing pant-type absorbent articles each article (21) including a chassis structure having at least one elastic panel and an integrated absorbent core component (32), the method including a continuous pant-forming process comprising forming the chassis structure and incorporating the absorbent core component (32) into the chassis structure. The at least one elastic panel is formed by a) separately producing a two-layer laminate (8) comprising a first non-elastic fibrous nonwoven web (1) and an elastic film (6), b) activating the two-layer laminate (8) by incremental stretching in at least one direction to render the two-layer laminate (8) elastically stretchable, c) stretching the activated two-layer laminate (8) by 10-200% in at least one direction, d) introducing the two-layer laminate (24,25) in the pant-forming process, and e) laminating the elastic film (6) of the stretched two-layer laminate (24,25) to an elastic or nonwoven chassis component (39, 40, 23, 54).
    Type: Application
    Filed: May 12, 2006
    Publication date: November 25, 2010
    Applicant: SCA Hygiene Products AB
    Inventors: Elisabeth Lakso, Margareta Wennerbäck, Jan Wästlund-Karlsson
  • Publication number: 20100274213
    Abstract: An absorbent article includes an absorbent section having first and second end portions and a central portion. A waist belt is attached to the absorbent section at its first end and has first and second belt portions extending on each side of the first end of the absorbent section for securing to each other around a wearer of the absorbent article. The second end of the absorbent section includes a fastening device for securing the second end of the absorbent section to the waist belt. The waist belt has a visual appearance different from the absorbent section, so as to simulate a belt. This provides the user with intuitive information on how the absorbent article should be applied.
    Type: Application
    Filed: April 27, 2009
    Publication date: October 28, 2010
    Applicant: SCA HYGIENE PRODUCTS AB
    Inventors: Maria Gustin Bergstrom, Margareta Wennerback
  • Publication number: 20100130956
    Abstract: A pant-type absorbent article having an absorbent assembly having an absorbent core and a chassis, wherein the front and back portions are joined to each other along two opposite longitudinal side edges to define a waist-opening and a pair of leg-openings, at least one of the front and back portions has an elastic web material, a crotch portion located between the front portion and the back portion in the longitudinal direction of the article, the front portion having a length in the longitudinal direction, the back portion having a length in the longitudinal direction, and the crotch portion having a length in the longitudinal direction, the absorbent assembly overlapping a distance with both the front and back portions, the article having a longitudinal and a transverse direction, wherein the absorbent assembly overlaps no more than 20% of the surface area of each of the front and back portions.
    Type: Application
    Filed: January 28, 2010
    Publication date: May 27, 2010
    Applicant: SCA Hygiene Products AB
    Inventor: Margareta WENNERBÄCK